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on youtube when i try to play a video it tells me to install missing plugins which was working alright before after the update it has seriouslly messed up

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so whats wrong when i goto a different website the video works fine is this a problem with youtube or mozillia its self and it was working perfectly yesterday

URL of affected sites

http://www.youtube.com/

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You didn't say which version of Firefox you updated from, but you have an old version of Java installed for Firefox. Java Plug-in 1.6.0_12 for Netscape Navigator (DLL Helper)

Update to the latest Java 1.6.0_21 version and see if that solves your "missing plugins" problem.